TV Information not pulling after 550 series?

[blim5001]

There is not a 550 limit.

It could be this:

Notice: Metadata using TVDB agent

You may notice a failure to fetch metadata for new media if you are using TVDB as an agent. This is due to TVDB changing their API to v3. Please see this post on their forums for further details. https://forums.thetvdb.com/viewtopic.php?f=3&t=60048